* {
  margin: 0;
  padding: 0;
}
.contain {
  top: 30px;
  width: 1072px;
  height: 622px;
  margin: auto;
  position: relative;
  box-sizing: border-box;
  padding: 16px;
  display: flex;
  justify-content: space-between;
  box-shadow: 0 0 9px 9px #ececec;
}
.contain .left-t {
  display: inline-block;
  width: 825px;
  height: 592px;
  overflow: hidden;
}
.contain .left-t ul {
  width: 825px;
  transition: 0.7s;
}
.contain .left-t ul li {
  width: 825px;
  height: 592px;
  margin-bottom: 30px;
}
.contain .left-t ul li img {
  width: 100%;
  height: 100%;
}
.contain .left-t ul li:nth-last-child(1) {
  margin-bottom: 0px;
}
.contain .right-l {
  width: 162px;
  height: 592px;
  position: relative;
  margin-right: 10px;
}
.contain .right-l ul {
  position: relative;
  width: 160px;
  height: 592px;
  box-sizing: border-box;
  width: 100%;
  height: 100%;
  transition: 1s;
}
.contain .right-l ul li {
  position: relative;
  width: 100%;
  height: 90px;
  margin-bottom: 35px;
}
.contain .right-l ul li img {
  width: 100%;
  height: 100%;
}
.contain .right-l ul li:nth-last-child(1) {
  margin-bottom: 0px;
}
.contain .right-l ul .ad {
  border: 3px solid #af5000;
  box-sizing: border-box;
}
.contain .right-l ul .ad::after {
  position: absolute;
  content: '';
  left: -16px;
  top: 35px;
  border-top: 8px solid transparent;
  border-left: 8px solid transparent;
  border-right: 8px solid #af5000;
  border-bottom: 8px solid transparent;
}
li {
  list-style: none;
}
